Oil-well swab



AQLZ W- W. MILLER OIL WELL swAB @pril 29 W2@ Filed Oct. 5, 1922 Patented Apr. 29, 1924.

Nurse STATE WILLIAM W. MILLER, 0F BUNGER, TEXAS.

OIL-WELL SWAB.

Application led October 3, 1922, Serial No. 592,063.

To all whom it may concern.'

Be it known that I, WILLIAM W. MILLER, a citizen of the United States, residing at Bunger, in the county of Young, State of Texas, have invented certain new and useful Improvements in Oil-Well Swabs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such 'as will enable others skilled in the art to which it appertains to make andnse the same. v

This invention relates to new and useful improvements in oil well devices and par ticularly to oil well swabs.

One object of the invention is to provide a swab of such construction that greater eciency is produced, which reults in the extraction of a larger amount of liquid from the well than with similar devices heretoore.

Another object is to provide a device of this ,character wherein the ends ofthe rubber are protected against spreadin action.

A further object is to provi e a device of this character wherein the liquid and sediment may be more easily and quickly permitted to enterA the lower end of the device, and be retained above the rubber.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation of the swab made in accordance with the resent invention.

Figure 2 is a longitu mal central sectional view through the swab.

Referring particularly to the accom anyin drawin 10 represents the chuc receiving hea of the tool which includes an elongated cylindrical body the intermediate rtion of which is reduced and angular and gids a cavity or chamber 11 therein which extends throu h the lower end thereof, and in the walls o which are formed the outlet o enings 12. Screwed into the lower end of t e head 10 is the upper end of a pipe 13, and dis osed on this pipe, below the head is a rub er sleeve 14, o a diameter sutiicient to fit within the well casing or tube, not shown. On the pipe 13, between the lower end of the head 10 and the upper end of the sleeve 14, and below the lower end of the sleeve, are the packing rings 15 and 16, res ectively, the faces of said rings abutting e ends of the sleeve being concave to t the convex end faces of the sleeve. This construction serves to retain the ends of the sleeve against spreading action, as Will be readily understood. A nut 17 is threadedly engaged on the pipe 13, below the ring 16, and is turned upwardly against the lower end of the sleeve.

Screwed onto the lower end of the pipe 13 is a sleeve 18, a lock nut 19 being engaged on the pipe anddriven down against the sleeve. The pipe 13 extends to a distance intothe sleeve, and is'formed with a series movement. A jam nut 26 is engaged on the pipe 22 and is turned upwardly a ainst the lower end of the sleeve 18, as clear y seen in Figure 2, of the drawing. The portion of the pipe 22, below the sleeve 18, is perforated for the entrance of the liquid from the bottom of the well. A closure cap 27 is screwed onto the lower end of the pipe 22, to exclude lar e particles from the pipe.

Attention is directed to the fact that the pipe 13 extends into the head 10 and into the sleeve 18, to such a distance that danger of the threads of the pipe being stripped is reduced to a minimum. In devices of this character heretofore' the pipe has been merely screwed into the ends of the upper and lower connections, with the result that the strain, both vertically and sidewise, often caused the stripping of the threads ofl the ipe, and the loss of the swab in the we casing, and the expenditure of time and labor in fishing out the swab. With the present device the parts are so formed and connected that great strength is produced, and danger of breakage reduced to a minimum.

Another feature which mightrbe again aus accented is the particular formationof the v packing rings at the up r and lower ends of the rubber'sleeve, w ich serve to confine the ends of the sleeve and thus prevent spreading thereof.

Formed in the intermediate portion of the pipe 13, midway of the length ofthe sleeve 14, are the perforations 13', which permit the pressure of the fluid from within the pipe to press againstthe rubber sleeve.

at is claimed is:-

1. A well yswab including a. central conduit, a. sleeve on the conduit and receiving A the conduit therein, the sleeve being enlarged toform e chamber surrounding the internally disposed portion of the conduit,

vvthe said portlon of the conduit being perforated, a valve seat in the lower end of the'sleeve, and a valve on'the seat and havingel stem slidably guided in the lower end of the conduit.

12. A. welll swab including a. pistonv having l. e central conduit extending beyond lone end of the body of the piston end being perl momie forated and externally threaded, e sleeve threaded through each end portion and being formed centrally with e chamber, the perforated end of said conduit being engaged through one of said threaded ends of the sleeve and lying within said chamber, a perforated tube engaged in the other threaded end of the' sleeve and having its engaged end lying in the bottom of said chamber and forming a valve seat, and a,

valve on 'the seat and having.. a, stem slidable in theadjacent end of the conduit.

In testimony whereof, I eiiix my signature, in the presence of two witnesses;

WLLIAM W. LLER. Witnesses:

WAIJrnR DAVID,

R. G. Cron. 

